Marcos García Fernández (born 4 December 1986) is a Spanish former road bicycle racer, who competed as a professional from 2009 to 2022. Career Born in San Martín de Valdeiglesias, García has compete
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2457d9d9b1f68920fc5b736d7e5b946d1eb6113d735eee58173ca86e491dc3a7. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62a29301-57ac-4496-91f6-571b3386e279.json and https://artists.proofprofile.net/proofs/artist/62a29301-57ac-4496-91f6-571b3386e279.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).